Being in design school I'd love if anyone posted some cool concept art from unreleased games. For inspiration purposes. Been looking around Unreal64 and haven't found much.
Fireteam Rogue had some pretty awesome art. In fact, they were going to make a comic book and animated TV series out of that game. There is a ton of artwork here: http://www.flyinggoat.com/Comic/comic_main.html
The Fireteam Rogue md proto is crap but it might of been a cool game in the end. ive got pics of a game called the new breed in a mag i still need to scan that has some art of the fighters but again to me the game looks dull.
I have a 70-80% complete snes prototype, and yeah, the game is not very impressive. The graphics look like a Genesis game, and have a limited palette. But yeah, the concept art is pretty awesome.
The concept art for the never-developed Elevator Action DS is pretty great. I wish they made a game based on it! http://www.boingboing.net/2010/02/10/harvey-weapons-taito.html